Chanakya initially draws Sakadala into a sense of security thinking that they won’t pay too many costs to conquer Magadha. Sakadala will be expecting us to attack Vaishali first, to secure it. Instead we shall attack Pataliputra and place it under siege, then send an army to fight Vaishali when they are unable to communicate with Pataliputra. This will serve two purposes: one, to demonstrate to Sakadala that we will capture Magadha, and not be satisfied with Vaishali alone. Two, to take him by surprise, before he has the time to properly fortify Pataliputra.